Hadhrat Anas (radiallahu anhu) narrates that Rasulullah (sallallahu alayhi wasallam) said:
“Whoever has in him three things, will experience the sweetness of Imaan.” (These are):
i) His love for Allah and His Rasool is more than that for all and everything.
ii) His love for another (person) is motivated by only the love of Allah. i.e. His love and friendship with people are not for worldly motives. He befriends people because they happen to be pious men of Allah).
iii) A man who, after having been saved by Allah from kufr, abhors returning to kufr as much as he abhors falling into a fire.”
Hadith: Sweetness of Faith